What Gri is

Gri is a language for scientific graphics programming. The word "language" is important: Gri is command-driven, not point/click.

Some users liken Gri to LaTeX, since both provide extensive power in exchange for patience in learning syntax.

Gri can make x-y graphs, contour graphs, and image graphs, in PostScript and (someday) SVG formats. Control is provided over all aspects of drawing, e.g. line widths, colors, and fonts. A TeX-like syntax provides common mathematical symbols.

Starting to use Gri

Folks who write thousand-line Gri scripts usually start with something as simple as the following, which produces an auto-scaled graph.

   open file.dat
   read columns x y
   draw curve

The Gri emacs mode provides a suite of helpful features, such as syntax colouring, command completion, and a tight linkage to the online manual; see the screenshots for illustration.